Example #1
0
 /**
  * Reads in text from standard input; calculates the frequency of
  * occurrence of each character over the alphabet specified as a
  * commmand-line argument; and prints the frequencies to standard
  * output.
  *
  * @param args the command-line arguments
  */
 public static void main(String[] args) {
     Alphabet alphabet = new Alphabet(args[0]);
     final int R = alphabet.radix();
     int[] count = new int[R];
     while (StdIn.hasNextChar()) {
         char c = StdIn.readChar();
         if (alphabet.contains(c))
             count[alphabet.toIndex(c)]++;
     }
     for (int c = 0; c < R; c++)
         StdOut.println(alphabet.toChar(c) + " " + count[c]);
 }